/*
 * Copyright (C) 2008-2009 the original author or authors
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.code.liquidform.conditions;

/**
 * To be implemented by enums that link parts of an expression together.
 * Operators may be involved in {@link UnaryExpression},
 * {@link BinaryExpression} or {@link TernaryExpression} in which case they
 * should implement {@link TernaryOperator}.
 * 
 */
public interface Operator {

	/**
	 * Get the String representation of this operator, as it should appear in
	 * the JPA query.
	 */
	public String getStringRepresentation();

}
